Choosing high quality colored optical glass for material, utilizing processing, we fabricate filter. Its coated surface and its specific spectral characteristic can meet your all kinds of demands. There are three kinds of filter(white-black, color and specfic application), 40 types in our factory with the size of M46, M49, M52,M58 and so on. You are welcome to contact with us if your requirement is special.(/products-detail.asp?cpid=80)